<template>
  <div class="panel-tab__content">
    <el-form label-width="70px" @submit.native.prevent size="small">
      <el-form-item label="参数说明">
        <el-button size="mini" type="primary" @click="dialogVisible = true">查看</el-button>
      </el-form-item>
      <el-form-item label="实例类型">
        <el-select v-model="loopCharacteristics" @change="changeLoopCharacteristicsType">
          <!--bpmn:MultiInstanceLoopCharacteristics-->
          <el-option label="并行多实例" value="ParallelMultiInstance" />
          <el-option label="串行多实例" value="SequentialMultiInstance" />
          <!--bpmn:StandardLoopCharacteristics-->
<!--          <el-option label="循环事件" value="StandardLoop" />-->
          <el-option label="无" value="Null" />
        </el-select>
      </el-form-item>
      <template v-if="loopCharacteristics === 'ParallelMultiInstance' || loopCharacteristics === 'SequentialMultiInstance'">
<!--去除手动配置任务多实例的生成次数-->
<!--        <el-form-item label="循环基数" key="loopCardinality">-->
<!--          <el-input v-model="loopInstanceForm.loopCardinality" clearable @change="updateLoopCardinality" />-->
<!--        </el-form-item>-->
        <el-form-item label="集合" key="collection">
          <el-input v-model="loopInstanceForm.collection" placeholder="示例: assigneeList" disabled @change="updateLoopBase" >
              <el-button slot="append" icon="el-icon-refresh-left" @click="handleReduction"></el-button>
              <el-button slot="append" icon="el-icon-user" @click="handleMultiSelect('users')"></el-button>
              <el-button slot="append" icon="el-icon-postcard" @click="handleMultiSelect('exp')"></el-button>
          </el-input>
        </el-form-item>

<!--        <el-form-item label="元素变量" key="elementVariable">-->
<!--          <el-input v-model="loopInstanceForm.elementVariable" placeholder="示例: assignee" disabled @change="updateLoopBase" />-->
<!--        </el-form-item>-->
        <el-form-item label="通过率" key="completionCondition">
          <el-row>
            <el-col :span="16">
              <el-progress :text-inside="true" :stroke-width="20" :percentage="loopInstanceForm.percentage" style="margin-top: 6px;"></el-progress>
            </el-col>
            <el-col :span="8">
              <el-input-number v-model="loopInstanceForm.percentage" size="mini" class="custom-input-number" controls-position="right" @change="updateLoopCondition" :min="0" :max="100"></el-input-number>
            </el-col>
          </el-row>
        </el-form-item>
<!--        <el-form-item label="异步状态" key="async">-->
<!--          <el-checkbox v-model="loopInstanceForm.asyncBefore" label="异步前" @change="updateLoopAsync('asyncBefore')" />-->
<!--          <el-checkbox v-model="loopInstanceForm.asyncAfter" label="异步后" @change="updateLoopAsync('asyncAfter')" />-->
<!--          <el-checkbox-->
<!--              v-model="loopInstanceForm.exclusive"-->
<!--              v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore"-->
<!--              label="排除"-->
<!--              @change="updateLoopAsync('exclusive')"-->
<!--          />-->
<!--        </el-form-item>-->
        <el-form-item label="重试周期" prop="timeCycle" v-if="loopInstanceForm.asyncAfter || loopInstanceForm.asyncBefore" key="timeCycle">
          <el-input v-model="loopInstanceForm.timeCycle" clearable @change="updateLoopTimeCycle" />
        </el-form-item>
      </template>
    </el-form>

    <!-- 参数说明 -->
    <el-dialog title="多实例参数" :visible.sync="dialogVisible" width="680px" @closed="$emit('close')">
      <el-descriptions :column="1" border>
        <el-descriptions-item label="使用说明">按照BPMN2.0规范的要求，用于为每个实例创建执行的父执行，会提供下列变量:</el-descriptions-item>
        <el-descriptions-item label="collection(集合)">传入List参数, 一般为用户ID集合</el-descriptions-item>
        <el-descriptions-item label="elementVariable(元素变量)">List中单个参数的名称，指定一个别名，以备动态指定。注意设置任务处理人时，一定要与别名一致</el-descriptions-item>
        <el-descriptions-item label="loopCardinality(基数)">List循环次数</el-descriptions-item>
        <el-descriptions-item label="isSequential(串并行)">Parallel: 并行多实例，Sequential: 串行多实例</el-descriptions-item>
        <el-descriptions-item label="completionCondition(完成条件)">任务出口条件</el-descriptions-item>
        <el-descriptions-item label="nrOfInstances(实例总数)">实例总数</el-descriptions-item>
        <el-descriptions-item label="nrOfActiveInstances(未完成数)">当前活动的（即未完成的），实例数量。对于顺序多实例，这个值总为1</el-descriptions-item>
        <el-descriptions-item label="nrOfCompletedInstances(已完成数)">已完成的实例数量</el-descriptions-item>
        <el-descriptions-item label="loopCounter">给定实例在for-each循环中的index</el-descriptions-item>
      </el-descriptions>
    </el-dialog>

    <!--会签人员-->
    <el-dialog
      title="选择会签人员"
      :visible.sync="multiOpen"
      width="65%"
      :close-on-press-escape="false"
      :destroy-on-close="true"
      append-to-body
    >
      <component :is="currentComponent" :suitType="'multi'" @handleAssignSelect="handleAssignSelect"/>
      <span slot="footer" class="dialog-footer">
        <el-button size="mini" @click="cancelAssignSelect">取 消</el-button>
        <el-button size="mini" type="primary" @click="saveAssignSelect">确 认</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
import {StrUtil} from '@/utils/StrUtil'
import {assignSelect} from "@/views/flowable/common/AssignUtils";
import FlowUsers from '@/components/Flow/Design/User';
import FlowExp from '@/components/Flow/Design/Expression';
import EventBus from '@/components/Process/common/EventBus'


export default {
  name: "MultiInstance",
  components:{
    FlowUsers,
    FlowExp
  },
  /** 组件传值  */
  props: {
    id: {
      type: String,
      required: true
    },
  },
  data() {
    return {
      dialogVisible: false,
      multiOpen: false,
      currentType: '', // 用于确定当前显示的组件
      loopCharacteristics: "",
      loopInstanceForm: {
        percentage: 100,
      },
      multiLoopInstance: {},
      defaultLoopInstanceForm: {
        completionCondition: "",
        loopCardinality: "",
        extensionElements: [],
        asyncAfter: false,
        asyncBefore: false,
        exclusive: false,
        percentage: 100
      },
    }
  },

  /** 传值监听 */
  watch: {
    id: {
      handler(newVal) {
        if (StrUtil.isNotBlank(newVal)) {
          this.getElementLoop(this.modelerStore.element.businessObject);
        }
      },
      immediate: true, // 立即生效
    },
  },
  computed: {
    currentComponent() {
      return this.currentType ? `flow-${this.currentType}` : '';
    }
  },
  created() {

  },
  methods: {
    // 方法区
    getElementLoop(businessObject) {
      if (!businessObject.loopCharacteristics) {
        this.loopCharacteristics = "Null";
        this.loopInstanceForm = {};
        return;
      }
      if (businessObject.loopCharacteristics.$type === "bpmn:StandardLoopCharacteristics") {
        this.loopCharacteristics = "StandardLoop";
        this.loopInstanceForm = {};
        return;
      }
      if (businessObject.loopCharacteristics.isSequential) {
        this.loopCharacteristics = "SequentialMultiInstance";
      } else {
        this.loopCharacteristics = "ParallelMultiInstance";
      }
      // 合并配置
      this.loopInstanceForm = {
        ...this.defaultLoopInstanceForm,
        ...businessObject.loopCharacteristics,
        completionCondition: businessObject.loopCharacteristics?.completionCondition?.body ?? "",
        loopCardinality: businessObject.loopCharacteristics?.loopCardinality?.body ?? "",
        percentage: this.extractNumberFromString(businessObject.loopCharacteristics?.completionCondition?.body),
      };
      // 保留当前元素 businessObject 上的 loopCharacteristics 实例
      this.multiLoopInstance = this.modelerStore.element.businessObject.loopCharacteristics;
      // 更新表单
      if (
        businessObject.loopCharacteristics.extensionElements &&
        businessObject.loopCharacteristics.extensionElements.values &&
        businessObject.loopCharacteristics.extensionElements.values.length
      ) {
        this.$set(this.loopInstanceForm, "timeCycle", businessObject.loopCharacteristics.extensionElements.values[0].body);
      }
    },

    changeLoopCharacteristicsType(type) {
      // 切换类型取消原表单配置
      this.loopInstanceForm = {...this.defaultLoopInstanceForm};
      // 取消多实例配置
      if (type === "Null") {
        this.modelerStore.modeling.updateProperties(this.modelerStore.element, {loopCharacteristics: null});
        this.noticeTaskPanel(false);
        return;
      }
      // 配置循环
      if (type === "StandardLoop") {
        const loopCharacteristicsObject = this.modelerStore.moddle.create("bpmn:StandardLoopCharacteristics");
        this.modelerStore.modeling.updateProperties(this.modelerStore.element, {
          loopCharacteristics: loopCharacteristicsObject
        });
        this.multiLoopInstance = null;
        return;
      }
      // 时序
      if (type === "SequentialMultiInstance") {
        this.multiLoopInstance = this.modelerStore.moddle.create("bpmn:MultiInstanceLoopCharacteristics", {
          isSequential: true
        });
      } else {
        this.multiLoopInstance = this.modelerStore.moddle.create("bpmn:MultiInstanceLoopCharacteristics");
      }
      this.modelerStore.modeling.updateProperties(this.modelerStore.element, {
        loopCharacteristics: this.multiLoopInstance
      });

      // 默认初始化设置
      this.loopInstanceForm.collection = this.id + "_assigneeList";
      this.loopInstanceForm.elementVariable = this.id + "_assignee";
      this.updateLoopBase();
      this.updateLoopCondition();
      this.noticeTaskPanel(true);
    },

    // 循环基数
    updateLoopCardinality(cardinality) {
      let loopCardinality = null;
      if (cardinality && cardinality.length) {
        loopCardinality = this.modelerStore.moddle.create("bpmn:FormalExpression", {body: cardinality});
      }
      this.modelerStore.modeling.updateModdleProperties(this.modelerStore.element, this.multiLoopInstance, {
        loopCardinality
      });
    },

    // 完成条件
    updateLoopCondition() {
      let completionCondition = null;
      if (this.loopInstanceForm.percentage) {
        const rate = this.loopInstanceForm.percentage / 100;
        const condition = "${multiEl.calculationCondition(execution," + rate + ")}";
        completionCondition = this.modelerStore.moddle.create("bpmn:FormalExpression", {body: condition});
      }
      this.modelerStore.modeling.updateModdleProperties(this.modelerStore.element, this.multiLoopInstance, {
        completionCondition
      });
    },

    // 重试周期
    updateLoopTimeCycle(timeCycle) {
      const extensionElements = this.modelerStore.moddle.create("bpmn:ExtensionElements", {
        values: [
          this.modelerStore.moddle.create(`flowable:FailedJobRetryTimeCycle`, {
            body: timeCycle
          })
        ]
      });
      this.modelerStore.modeling.updateModdleProperties(this.modelerStore.element, this.multiLoopInstance, {
        extensionElements
      });
    },

    // 直接更新的基础信息
    updateLoopBase() {
      this.modelerStore.modeling.updateModdleProperties(this.modelerStore.element, this.multiLoopInstance, {
        collection: this.loopInstanceForm.collection || null,
        elementVariable: this.loopInstanceForm.elementVariable || null
      });
    },

    // 各异步状态
    updateLoopAsync(key) {
      const {asyncBefore, asyncAfter} = this.loopInstanceForm;
      let asyncAttr = Object.create(null);
      if (!asyncBefore && !asyncAfter) {
        this.$set(this.loopInstanceForm, "exclusive", false);
        asyncAttr = {asyncBefore: false, asyncAfter: false, exclusive: false, extensionElements: null};
      } else {
        asyncAttr[key] = this.loopInstanceForm[key];
      }
      this.modelerStore.modeling.updateModdleProperties(this.modelerStore.element, this.multiLoopInstance, asyncAttr);
    },

    handleAssignSelect(selection) {
      if (selection) {
        if (this.currentType === 'exp') {
          // 处理表达式选中数据
          this.selectExpData = JSON.parse(JSON.stringify(selection));
        } else {
          // 处理审批选中数据
          this.selectDataList = JSON.parse(JSON.stringify(selection));
        }
      }
    },

    // 保存选中的数据
    saveAssignSelect() {
      if (this.currentType === 'exp') {
        const selection = this.selectExpData
        if (selection.id) {
          this.loopInstanceForm.collection = selection.expression;
        }
      } else {
        // 选择人员时,固定写入表达式
        const multiUserId = assignSelect(this.currentType, "", this.selectDataList).map(item => item.id).join(',') || '';
        this.loopInstanceForm.collection = "${multiEl.setFixedAssignee(execution,'" + multiUserId + "')}";
      }
      this.cancelAssignSelect();
    },

    // 固定写法
    handleReduction() {
      this.loopInstanceForm.collection = this.id + "_assigneeList";
      this.updateLoopBase();
    },

    // 选择会签人员
    handleMultiSelect(type) {
      this.multiOpen = true;
      this.currentType = type;
    },

    // 取消会签人员
    cancelAssignSelect() {
      this.updateLoopBase();
      this.multiOpen = false;
    },

    // 从字符串中提取数字
    extractNumberFromString(completionCondition) {
      if (completionCondition) {
        const regex = /-?\d+(\.\d+)?/;
        const matches = completionCondition.match(regex);
        if (matches) {
          return matches[0] * 100;
        } else {
          return 100;
        }
      } else {
        return 100;
      }
    },

    // 通知任务面板多实例有变化
    noticeTaskPanel(value){
      EventBus.$emit('multiInstance-updated', value);
    }
  }
}

</script>
<style lang="scss">
@import '../style/process-panel';
/* input-number属性设置 */
.custom-input-number {
  margin-left: 6px;
  width: 90px;
}
.custom-input-number .el-input__inner {
  margin-right: 20px;
}
</style>

